Particle jet flow-based drill bit for impacting and breaking rocks

Abstract

The invention belongs to the oil well drilling field and particularly relates to a particle jet flow-based drill bit for impacting and breaking rocks. The drill bit comprises a drill bit body, a drill bit blade, a nozzle jacket, inner nozzles and cutting teeth. The internal upper part of the drill bit body is provided with a drill bit inner cavity. The bottom of the drill bit inner cavity is provided with a nozzle flow path in communication with the drill bit inner cavity. The bottom of the nozzle flow path passes through the drill bit body. The nozzle flow path comprises a nozzle upper flow path and a nozzle lower flow path. The inner nozzles are arranged in the nozzle lower flow path. The nozzle jacket is arranged between the inner nozzles and the nozzle lower flow path. The tail end of the nozzle jacket is exposed out of the bottom of the drill bit body. The drill bit body is internally provided with three inner nozzles and the diameters of the inner nozzles are differed in stages. According to the technical scheme of the invention, the rock breaking efficiency of the drill bit is effectively improved, and the mechanical drilling rate during the petroleum drilling process is increased. Meanwhile, the deflection of the drill bit during the well drilling process is avoided. By means of the special particle jet flow-based drill bit for impacting and breaking rocks, not only the mechanical drilling rate of a roller bit is increased, but also the well deflection is effectively prevented at the same time.

Description

technical field [0001] The invention relates to a particle jet impact rock-breaking drill bit, which belongs to the field of petroleum drilling. Background technique [0002] With the continuation of oilfield exploration and development, shallow oil resources have been developed, and the focus of oil exploration and development has gradually shifted to deep wells, hard formations, and unconventional oil and gas resources. In the drilling process of these formations, there are problems such as slow drilling speed, easy well deviation, and high drilling costs, which seriously affect the development speed and benefits of deep hard formations and unconventional oil and gas resources. Particle jet drilling technology is one of the effective methods to solve this problem. This technology adds a certain proportion of steel particles to the drilling fluid. The steel particles are carried by the drilling fluid into the downhole drill bit from the drill string. The particles flow from...

AI Technical Summary

Problems solved by technology

During the drilling process of these formations, there are problems such as slow drilling speed, easy well deviation, and high drilling costs, which seriously affect the development speed and benefits of deep hard formations and unconventional oil and gas resources.

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